Honda Accord Acura RDX RSX Knock Sensor 30530-PPL-A01 Prevents Detonation

Honda Accord, Acura RDX, RSX with K-series engines: knock sensor OEM 30530-PPL-A01 uses industrial-grade piezoelectric ceramic and high-temperature resin. Compared to original, vibration resistance yields ~30% longer life. It detects engine ping by monitoring knock frequency and sends corrective ignition timing signals to ECU to prevent piston/cylinder wall damage. Located under the intake manifold; requires removing the throttle body to access. Recommended for experienced technicians.